195091008 has 112 divisors (see below), whose sum is σ = 593018880. Its totient is φ = 55448064.

The previous prime is 195090989. The next prime is 195091027. The reversal of 195091008 is 800190591.

It is an interprime number because it is at equal distance from previous prime (195090989) and next prime (195091027).

It is a tau number, because it is divible by the number of its divisors (112).

It is a self number, because there is not a number n which added to its sum of digits gives 195091008.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 509185 + ... + 509567.

Almost surely, 2^195091008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195091008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296509440).

195091008 is an abundant number, since it is smaller than the sum of its proper divisors (397927872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

195091008 is a wasteful number, since it uses less digits than its factorization.

195091008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784 (or 774 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 33.

The square root of 195091008 is about 13967.4982727760. The cubic root of 195091008 is about 579.9791986198.

The spelling of 195091008 in words is "one hundred ninety-five million, ninety-one thousand, eight".